Tone arm



J. N. TONE ARM Y Dec' 20, 1927.

Filed May 11. 192s lll Patented Een. 20, 1927.

lJbl-l'lflll) STATES Lassalle JOSEPH N.'PEPIN, 0F CHICAGO, ILLINOIS.

TONE ARM.

Application filed May 11, 1923. Serial No. 638,193.

My invention relates to improvements in tone arms particularly intended for phonograph?, or the like, and has among its objects the production of a device of the'kind described, which will be neat and attractive in appearance, simple, convenient, compact, durable, reliable, eiiicientand satisfactory for use wherever found applicable.

One oi the objects or' my invention isto provide a tone arm, which will be readily detachable from. its mounted position and which will be :treely rotatable in operative position with the minimum amountof friction. Y

Another object of my invention is to provide an articulated tone arm which shall be removable as a unit from its mounting and in which the various parts are detachably interconnected.

Many other object-s and advantages of the construction herein shown and described will be obvious to those skilled in the art from the disclosures herein given. l

To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described, and more particularly pointed out in the claims. j

In the drawings, wherein like reference characters indicate like or corresponding parts:

Fig. 1 is an elevation of my tone arm mounted in posit-ion and showing the mounte ing in cross section; n

Fig. 2 is an elevation of the non-friction Sleeve mounted in place on the collar and shown as projecting onto a flat surface;

Fig. 3 is a section taken substantially on line of Fig. 1; and

Vl? ig. A is a sectional detail taken on the line 4-11 of Fig. 1.

In the drawings, wherein I have illustrated the preferred embodiment of my invention, 1 indicates the upper plate or top part ot a talking-machine cabinet, upon which is rotatably mounted a turn-table 2 adapted to receive a record 3 thereon. An opening 4 is provided through the top of the cabinet 1 and leads to the tone chamber within the cabinet (not shown).

Adapted to communicate with the opening 4 is a tone arm section 5, preferably bent to form an L-shaped member, as shown. A tubular part 6 having a spherical head 8 is received within one end ot the member 5 and is held in place thereat by spring-pressed pins 9 arranged diametrically of the axis of the tubular parts, .so that the section 6 may move in a vert-ical plane relative to the section 5 'and yet maintain the parts in close contact to prevent -what is yknown ,as blast or the leakage of sound therepast. To de tach the part 6 from the part 5 the pins 9 are pressed inwardly against the pressure of the springs 20 and the parts are then pulled apart. Small sockets 21 are provided in the spherical portion 8 and the pins 9 are slidable through said sockets, it being noted that the pins are provided with enlargements 22 intermediate their ends to abut against the l base oi the sockets and'form stops.

A tone arm part 7 is connected to the part 6 and carries a reproducer 10 at its end, said reproducer carrying a needle-holder 11 .at one `end thereof adapted to receive a needle or stylus to ride in the grooves of therecord 3.

A collar 12 is mounted on the cabinet 1 at the opening 4t and is secured inv place by means of screws V13 or t-he like, said collar having a pair of substantially parallel annular kflanges 15 and 16 thereon extending radially inwardly and connectedby an annular wall member 14; so that there is an opening provided between the inner surface of the annular wall 14 and the opposed surfaces of the flanges 15 and 16.

A sleeve 17 is positioned Ain place between the opposed flanges 15 and 16 and is preventedl against vertical movement by 'said flanges, said sleeve having a series of ball members 18 rotatably arranged in pockets therein so that when the sleeve is rotated relative to the collar, the ball members will ride upon and engage the inner surface of the wall 14 and act as non-friction rollers. The balls 18 are of a diameter greater than the radial thickness of the sleeve 17 so that they project beyond the walls of said sleeve fili portion 6 frictionally engages the balls 18 so that said sleeve and balls act as a ballbearing between the tone arm and the collar, permitting a free rotational movement of the tone arm, and at the sam-e time permitting inst-ant removal of the tone arm without any and removal of screws or other fastening means.

The sleeve 17 may beplaced in position within the flanges l and 16 in any desired manner, as for instancebyforming the eolf lar initially with the separate flange l2 and then riveting this flange to the flange l2 shown, after the sleeve is in place.

The balls i8 may also be kept within the sleeve 17 in any preferred manner forassembly, as forinstanee by forming` the ball openings of larger diameter at one of the walls than at the other, as indicated, thence inserting the balls inplace and holding` them temporarily with a heavy oil or grease while 3 the sleeve 5 is being insertedvinto the collar,

after which the grease may be washed away with kerosene or the like.

It is obvious'that the methods described for `holdingthe balls in place and for inserting the sleeve but one'of any number of methods which may be employed.

Having thus described my invention, it is obvious that various in'nnaterial modifications may be made in the same without departing from thev spiritof' my invention;

hence :IV do not wish to be understood as lim-` with said collar andfsaid'tone arm, said tone arm being quickly removable from said sleeve.

2. lIn atalkingmachine,a collar secured to said machine at` the sound chamber thereof and having a pair of spaced annular flanges, the lower one of said flanges extending inwardly beyond the upper flange, an antifriction sleeve rotatably arranged between said flanges and engageable with said collar, and a tone arm in said sleeve `and quickly removable therefrom, said tone arm having its lower end engaging said lower flange.

3. In a talking machine, a collar secured to saidmachine of and having. a pair of spaced annular flanges, one of said flanges extending inwardly beyond the other flange, an antifriction sleeve rotatably arranged between said flanges andengageablewith said collar, and a tone arm slldably Vand vrotatably mounted m and quickly removable from at the soundchambler theresaid sleeve, and its lower end engagingsaid lower flange.

a. In a talking machine, the con'ibination with a collar, a pair of spacedA annular flanges on said collar, one-of Asaidalanges extending inwardly beyond the otherifiange, and an anti-frietion sleeve between said flanges'engageable with saidcollar, of a tone ,i

arm slidably and rotatably mounted in and quickly removable from said sleeve with its lower endk engaging the lowermost flange.` Y

y In testimony whereof, I4 have hereunto signed my naine.

JosnPH N. Panni. 

